Macroscale and Microscale Organic Experiments
7th Edition
ISBN: 9781305577190
Author: Kenneth L. Williamson, Katherine M. Masters
Publisher: Brooks Cole
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Question
Chapter 6, Problem 5Q
Interpretation Introduction
Interpretation:
The effect of turning off the steam valve before the screw clamp on the adapter trap is opened should be explained.
Concept introduction:
Steam distillation is employed to extract and purify the temperature-sensitive compounds. Steam distillation is generally used for organic compounds sensitive to temperature. The advantage of steam distillation technique is that the temperature-sensitive compounds can be boiled and extracted at lower temperature without decomposition.
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You have completed your recrystallization process, but you did not get any crystals back after you cooled your solvent. Troubleshoot this situation. Briefly describe reasons why your crystals did not form, and describe how you will get them back.
BRIEFLY explain why steam distillation can be used to purify or isolate temperature-sensitive materials.
What is different about steam distillation
Chapter 6 Solutions
Macroscale and Microscale Organic Experiments
Ch. 6 - Assign the peaks in the 1H NMR spectrum of eugenol...Ch. 6 - A mixture of ethyl iodide (C2H5I,bp72.3C) and...Ch. 6 - Prob. 3QCh. 6 - Prob. 4QCh. 6 - Prob. 5QCh. 6 - A mixture of toluene (bp110.8C) and water is steam...Ch. 6 - Did sublimation aid in the purification of the...Ch. 6 - Prob. 8QCh. 6 - Prob. 9QCh. 6 - Prob. 10Q
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- Why is it important to cool slowly during recrystallizationarrow_forwardGive some reasons that would lead you to purify a liquid by using vacuum distillation rather than by using simple distillation.arrow_forwardGive the advantages of using steam distillation in the recovery of an inorganic liquid from a mixture.arrow_forward
- What are the differences between a simple distillation and steam distillation?arrow_forwardwhat is the purpose of steam distillation? and what are the factors involved ?arrow_forwardWhen isolating the solid after recrystallization using vacuum filtration what solvent should you use to aid in the rinse from the Erlenmeyer flask to the vacuum filter funnel? (Only pick one answer) Group of answer choices: Cold ethyl acetate Cold ethanol Hot ethyl acetate Hot ethanol Hot water Cold water None of the above, it should not be risnedarrow_forward
- Which is the most appropriate way to dispense liquid using a dropper (vertical, 45° angle, or horizontal? Justify your answerarrow_forwardIn recrystallization, fluted filter paper is used instead of a regular cone because it minimizes its contact with the glass funnel. Why is this important?arrow_forwardSublimation is preferred for small scale purification as compared to crystallization because there is little loss of material during transfer True, sublimation guarantees a 100% yield False, the crystallization process is better because it yields a much purer product especially in small scale purification processes True, sublimation has less loss of material because the process has no intermediate liquid stage False, sublimation is better for large scale purification processes.arrow_forward
- TRUE OR FALSE, if false then give the correct word to make the statement true then explain 1. Sublimation occurs when a solid has a relatively high vapor pressure at a temperature [above] its melting point. 2. To isolate the desired chemical, a single extraction is [more efficient] than extracting the compound numerous times. 3. The compounds are separated in liquid-liquid extraction based on their relative solubilities in two [immiscible] liquids.arrow_forwardDescribe the procedure of how to collect and dry your newly recrystallized compound.arrow_forwardIf you do not heat your crucible strongly enough to remove all volatile impurities when you heat the crucible empty, what will be the result if those impurities are completely volatilized when heating your sample?arrow_forward
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